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This study focuses on the energy storageEnergy storage potency of chemically polymerized polyanilinePolyaniline. The electrochemical property of this polymer strongly depends on the oxidizing agent used for its synthesis. In this study, varying mole ratios of ammonium persulfate (APS)—the oxidizing agent was added to aniline monomer. Structural and morphological characterizationsCharacterization such as X-ray diffraction (XRD), scanning electron microscopyScanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) were conducted on synthesized samples. The electrochemical analysis was done with a three-electrode system to perform cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS). The study revealed that PANI2 (with APS and aniline ratio of 2:1) electrode exhibited the best electrochemical performance with a specific capacity of 342.7 Fg−1 at 5 mVs−1 scan rate and 232 Cg−1 at a current density of 0.5 Ag−1. PANI2 also gave a capacity retention of 36.99% after 1000 charge–discharge cycles. The study revealed that an increase in the amount of APS over the monomer gave a better electrochemical performance. The authors also recommend that this APS: aniline ratio of 2:1 can also be adopted in the production of polyaniline-based composite for improved specific capacitance, cyclability, and coulombic efficiency for supercapacitor electrode materials.

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Influence of Oxidant and Dopant on the Electrochemical Performance of Polyaniline

  • 会议论文

  • 发表日期：

    2025年

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  • Okechukwu Benjamin Okafor,
  • Abimbola Patricia Idowu Popoola,
  • Olawale Muhammed Popoola,
  • Mercy Ogbonnaya

摘要

This study focuses on the energy storageEnergy storage potency of chemically polymerized polyanilinePolyaniline. The electrochemical property of this polymer strongly depends on the oxidizing agent used for its synthesis. In this study, varying mole ratios of ammonium persulfate (APS)—the oxidizing agent was added to aniline monomer. Structural and morphological characterizationsCharacterization such as X-ray diffraction (XRD), scanning electron microscopyScanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) were conducted on synthesized samples. The electrochemical analysis was done with a three-electrode system to perform cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS). The study revealed that PANI2 (with APS and aniline ratio of 2:1) electrode exhibited the best electrochemical performance with a specific capacity of 342.7 Fg−1 at 5 mVs−1 scan rate and 232 Cg−1 at a current density of 0.5 Ag−1. PANI2 also gave a capacity retention of 36.99% after 1000 charge–discharge cycles. The study revealed that an increase in the amount of APS over the monomer gave a better electrochemical performance. The authors also recommend that this APS: aniline ratio of 2:1 can also be adopted in the production of polyaniline-based composite for improved specific capacitance, cyclability, and coulombic efficiency for supercapacitor electrode materials.